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ACM Transactions on the Web (TWEB), Volume 5 Issue 4, October 2011

A Practical Architecture for an Anycast CDN
Hussein A. Alzoubi, Seungjoon Lee, Michael Rabinovich, Oliver Spatscheck, Jacobus Van Der Merwe
Article No.: 17
DOI: 10.1145/2019643.2019644

IP Anycast has many attractive features for any service that involve the replication of multiple instances across the Internet. IP Anycast allows multiple instances of the same service to be “naturally” discovered, and requests for...

Efficient Search Engine Measurements
Ziv Bar-Yossef, Maxim Gurevich
Article No.: 18
DOI: 10.1145/2019643.2019645

We address the problem of externally measuring aggregate functions over documents indexed by search engines, like corpus size, index freshness, and density of duplicates in the corpus. State of the art estimators for such quantities [Bar-Yossef...

Characterizing Organizational Use of Web-Based Services: Methodology, Challenges, Observations, and Insights
Phillipa Gill, Martin Arlitt, Niklas Carlsson, Anirban Mahanti, Carey Williamson
Article No.: 19
DOI: 10.1145/2019643.2019646

Today’s Web provides many different functionalities, including communication, entertainment, social networking, and information retrieval. In this article, we analyze traces of HTTP activity from a large enterprise and from a large...

Camera Brand Congruence and Camera Model Propagation in the Flickr Social Graph
Adish Singla, Ingmar Weber
Article No.: 20
DOI: 10.1145/2019643.2019647

Given that my friends on Flickr use cameras of brand X, am I more likely to also use a camera of brand X? Given that one of these friends changes her brand, am I likely to do the same? Do new camera models pop up uniformly in the friendship graph?...

A Specialized Search Assistant for Learning Objects
Cecilia Curlango-Rosas, Gregorio A. Ponce, Gabriel A. Lopez-Morteo
Article No.: 21
DOI: 10.1145/2019643.2019648

The Web holds a great quantity of material that can be used to enhance classroom instruction. However, it is not easy to retrieve this material with the search engines currently available. This study produced a specialized search assistant based...